Professional ChArUco Calibration Boards for Advanced Computer Vision Applications
ChArUco boards combine the robust detection capabilities of ArUco markers with the high accuracy of traditional checkerboard patterns, delivering the most reliable solution for camera calibration in machine vision, robotics, and augmented reality applications.
Our ChArUco calibration targets feature a unique hybrid design where ArUco markers are embedded within checkerboard corners, enabling partial visibility calibration and automatic pose estimation even when portions of the board are occluded. This makes them ideal for challenging industrial environments where complete board visibility cannot always be guaranteed.
Applications & Uses
 Camera and Lens Calibration Ensure accurate measurements and correct lens distortions for various camera-based applications. |
 Robotics and Computer Vision Improve the accuracy of vision systems in robotics and automated systems. |
 Industrial Inspection Enhance the reliability of image-based inspection systems in manufacturing and quality control. |
 Autonomous Vehicle |
 Research and Retail |
Choose Your Substrate Material --precision+lighting condition
We offer a wide range of sensor calibration products supporting different kinds of sensors like Camera, LiDAR, Radar, IMU, and more.
precision+lighting condition, available in 3 Precision Substrates:
- Soda Lime Glass: ±1μm accuracy, ideal for high-precision optical metrology
- Matte Ceramic: ±2μm accuracy, zero-reflection surface for front-lit applications
- Photographic Film (Mylar): ±15μm accuracy, lightweight and cost-effective
| Material | Coating Type | Illumination | Min./Max. Size | Thickness | Minimum Line/space Feature Accuracy |
| Soda Lime Glass | Brown/ Blue/Silver Chrome（Laser Writing） | Backlight | 4mm*4mm/800mm*960mm | 1.6mm；2.3mm；3mm；4.8mm… | 1μm/0.7μm |
| Quartz Glass | Brown/ Blue/Silver Chrome（Laser Writing） | Backlight | 4mm*4mm/800mm*960mm | 1.6mm；2.3mm；3mm；4.8mm… | 0.5μm |
| Film | Photosensitive ink | Backlight | 1m*1m/1.3m*2.6m | 0.1mm/0.18mm | 15μm/30μm |
| Matte Ceramic | Brown/ Blue Chrome（Laser Writing） | Front Lighting | 4mm*4mm/228mm*228mm | 1mm,2mm | 4μm |
| Glossy Ceramic | Brown/ Blue Chrome（Laser Writing） | Front Lighting | 4mm*4mm/228mm*228mm | 1mm,2mm | 2μm |
Substrate Material Technical Specifications
We offers all kinds of camera calibration materials, below listed 3 most popular ones, glass, ceramic and film material. Click below tabs to see detailed specification.
Glass Calibration Boards
| Pattern | Substrate Material | |||||||
| Production Process | Laser Writing | Substrate Material of Glass | Soda Lime Glass (Float Glass) | Quartz Glass (Fused Silica) | ||||
| Minimum Line/space | 1μm / 0.7μm | Transmission (@550nm) | >90% | >95% | ||||
| Feature Accuracy Overall Accurac | ±1μm | Thermal Expansion Coeff (20-200 ℃) | <80X10⁻⁷/K | <5.0x10⁻⁷/K | ||||
| Coating Type | Bright Chrome (High Reflective) | Brown Chrome (Usual) | Blue Chrome (Low Reflective) | Expansion Ratio (20-200 ℃) | 0.00085％ (8.5μm/℃ of 1m) | 0.00006％ (0.6μm/℃ of 1m) | ||
| Reflectivity | < 66% @550nm | <6% @550nm | < 13.4% @550nm | Surface Flatness | <5μm (Dimension<100mm) | <1μm (Dimension<50mm) | ||
| < 73% @650nm | < 17% @650nm | 1.8% @650nm | <20μm (Dimension<200mm) | <2μm (Dimension<100mm) | ||||
| < 68% @750nm | < 23% @750nm | < 2.67% @750nm | <50μm (Dimension>200mm) | <5μm (Dimension>100mm) | ||||
| Coating Thickness | 120nm (±0.20nm) | 100nm (±0.20nm) | 120nm (±0.20nm) | Surface Roughness | <0.025μm | |||
| Optical Density OD | >3 | >3 | >4.5 | Thickness | 1.6mm (±0.3mm) | 2.3mm (±0.3mm) | 3.0mm (±0.3mm) | 4.8mm (±0.3mm) |
| White Background | Minimum Line/space: 10μm, Thickness: 40μm (White & Smooth Coating on the Back Side) | MIN / MAX Overall Size | MIN: 4x4mm, MAX: 800x960mm (±0.1mm) | |||||
| Positive / Negative | Positive: Opaque Pattern, Clear Background. Negative: Clear Pattern, Opaque Background. |
Overall Shape | Any Shape by Laser Cutting | Square | Oval | Round | ||
| Frosted Glass on the Back | Frosted glass on the back are on request. | Special-shaped | Hole | Chamfer | Angle | Corner | ||
Ceramic Calibration Boards
| Pattern | Substrate Material | ||||||
| Production Process | Laser Writing | Type | Chrome pattern on the matte ceramic substrate | Chrome pattern on the glossy ceramic substrate | |||
| Type | Matte Ceramic | Glossy Ceramic | Substrate Material of Ceramic | White or near white reflective material, comprising of 96% compacted Alumina. | |||
| Minimum Line/space | 4μm | 2μm | Thickness | 1mm (±0.1mm) (common) |
0.38mm (±0.1mm) | 0.635mm (±0.1mm) | 2mm (±0.1mm) |
| Feature Accuracy | ±2μm | ±1μm | Surface Flatness | <30μm (Dimension<100mm) | <60μm (Dimension<200mm) | <100μm (Dimension>200mm) | |
| Overall Accuracy | ±2μm | ±1μm | MAX / MIN Overall Size | MIN: 4x4mm (±0.1mm) MAX: 228x228mm (±0.1mm) | |||
| Coating Type | Chrome | Chrome | Surface Roughness | <0.2-0.7μm | |||
| Coating Glossy or Matte | Matte | Glossy | Thermal Expansion Coeff (40-400 ℃) | <6.7X10⁻6/K | |||
| Reflectivity | < 12.88% @550nm | < 9.56% @550nm | Specific Gravity | ≥ 3.66 g/cm3 | |||
| < 10.62% @650nm | < 1.89% @650nm | ||||||
| < 12.23% @750nm | < 11.168% @750nm | ||||||
| Coating Thickness | 100-120nm | Rockwell hardness | ≥80 HRA | ||||
| Positive / Negative | Positive: Opaque Pattern, Clear Background. Negative: Clear Pattern, Opaque Background. |
Overall Shape | Any Shape by Laser Cutting | Square | Oval | Round | |
| Protection layer | Pellicle above the chrome layer making the chrome pattern more durable. |
Special-shaped | Hole | Chamfer | Angle | Corner | |
Film Calibration Boards
| Product | Film | |
| Pattern | Production Process | Laser Drawing |
| Minimum Line/space | 15μm / 30μm | |
| Feature Accuracy | ±10μm | |
| Coating | Silver Bromide | |
| Coating Thickness | 5μm | |
| Optical Density OD | 100% Black 4-4.5 (OD are on request） | |
| Color Selection | Black, Gray Scale, Gradients(Moire pattern is unavoidable). | |
| Film Base | Application | For backlight illumination/ transmission illumination applications |
| Expansion Coeff | 18μm/℃ of 1m | |
| The film contract with heat and expand with cold. | ||
| When the relative humidity is constant, the film with a length of 1m will change by 18μm when the temperature changes by 1℃. | ||
| Transmission (400~700nm) | >83% | |
| Film Base Thickness | 0.175mm / 0.1mm (±0.01mm) | |
| MAX Size | 1x1m (±0.1mm) (Min Line 15μm) 1.3x2.6m (±0.1mm) (Min Line 30μm) |
|
| Waterproof | Waterproof | |
| Overall Shape | Straight Edge Cutting / Round Hole Hollowing by Laser Cutting | |
| Custom Service | Digitalize Drawing | Our engineers would help you digitize the drawing for free. |
| Matchable Backlight | Provide matchable backlight for film targets. | |
| Test Report by OKLAB | Available | |
| Customization Production Days | 3 Working Days | |
| Customization Quantity | Customization MOQ is 1 pcs. | |
